On 10.07.2013, at 12:39, Benjamin Herrenschmidt wrote:

> On Wed, 2013-07-10 at 12:33 +0200, Alexander Graf wrote:
>> 
>> It's not exactly obvious that you're calling it with writing == 1 :).
>> Can you create a new local variable "is_write" in the calling
>> function, set that to 1 before the call to get_user_pages_fast and
>> pass it in instead of the 1? The compiler should easily optimize all
>> of that away, but it makes the code by far easier to read.
> 
> Ugh ?
> 
> Nobody else does that .... (look at futex :-)

Yeah, that's fortunately code that I don't have to read :).


Alex

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